That's the issue though... you don't need a dedicated server to serve 1m users, and you don't need to add web servers, load balancing, replicating etc etc VPS

That's the issue though... you don't need a dedicated server to serve 1m users, and you don't need to add web servers, load balancing, replicating etc etc VPS servers are so cheap and more than enough. The current web stacks are just ridiculously lousy.